Filter

ABSTRACT

A filter wherein a plurality of rocking hollow plates are provided as connected alternately with a plurality of fixed hollow plates through washers.

United States Patent Hata Apr. 9, 1974 [54] FILTER 1,932,663 10/1933Haug 210/19 [76] Inventor: Hidetoshi Ham, Oaze-Ae,

Chikuho-Machi, Kaho-Gun, Japan Przmary Exammer-Sam1h N. Zaharna [22]Flledl J Assistant ExaminerF. F. Calvetti [21] APPL NW 259,813 Attorney,Agent, or Firm1-1olman & Stern [52] U.S. Cl .5210/174, 210/383, 210/402[51] Int. Cl .1. B0ld 35/20 [58] Field of Search 210/77, 19, 350, 351,407, [57] ABSTRACT 339 i A filter wherein a plurality of rocking hollowplates are provided as connected alternately with a plurality [5 6] Refr Cit d 0f fixed hollow plates through washers. UNITED STATES PATENTS2,763,375 9/1956 Shaughnessy 210/383 X 2 Claims, 5 Drawing FiguresFILTER BACKGROUND OF THE INVENTION This invention relates to a filterwhich may be used for example in a screw press well-known in the art,and constructed so that clogging of the filter is prevented.

DETAILED DESCRIPTION OF THE DRAWINGS FIG. 4 is a side view of thesection of the embodiment of FIG. 3.

FIG. is a side view of the embodiment of FIG. 3 as seen from the leftend.

DETAILEDIDESCRIPTION OF PREFERRED EMBODIMENTS An embodiment of thepresent invention will now be described with reference to FIGS. 1 and2.A feeding port (17) is provided in the upper part of a right cylinder(31 fixed hollow plates 5)-each provided with a circular aperture (35)and rocking hollow plates (6) each provided with a circular aperture(37) are arranged alternately with each other and the fixed hollowplates (5) are fastened with nuts by passing long bolts (8) through themthrough washers (7) between the fixed hollow plates (5), the'thicknessof the washer (7) maintains the clearance between the fixed hollowplates in order to allow the rocking plates to be movable, between aleft cylinder (34) having a discharging port (33) and the abovementioned right cylinder'(31), a lug is projected from each-of the rightand left side of said rocking hollow plate (6), horizontal long pins(12) are passed through said lugs (10), a connecting rod (11) ispivotally jointed atone end with said horizontal long pin (12) and atthe other end with a crank (13) fitted to a rotary shaft (16 rotatedwith a power unit (not illustrated) and a screw conveyer (24) is carriedby right cylinder (31) and left cylinder (34). The diameter of thecircular aperture of the fixed hollow plate maybe different from thediameter of the circular aperture of the rocking hollow plate dependingupon the characteristic of the material.-

The operation of the above device is as follows. A material to befiltered is fed'in through the feeding port (17). While it is beingconveyed by the screw conveyer (24), water and fine particleswill flowdown between the fixed hollow plate (5) and the rocking hollow plate (6)and only solids will be discharged from the discharging port (33).

An alternative form of the invention is shown in FIGS. 3 and 4 wherein ahollow cylinder (2) is fitted to a frame (1) and is partly cut, rightand left hollow outer cylinder end plates (3) and (4) are fitted to thecylinder 2 at the cut part, fixed hollow plates (5) and rocking vhollowplates (6) are alternately arranged through washers (7 between saidouter cylinder end plates (3) and (4) to form a multiplate filteringpart (9), a lug (10) is projected from each of the right and left sideof each rocking hollow plate (6), said lugs (10) on each side arepivotally jointed through a horizontal connecting pin (12) with aconnecting rod (11) at the lower end, said connecting rod (1 1) ispivotally jointed at the upper end with a crank (13), a crank shaft (16)is made rotatable through an operatively connecting mechanism by a motor(14) fitted in the upper part of a frame (1), a feeding port (17) isprovided in the right upper part of the above mentioned hollow cylinder(2), a bearing plate (19) provided with a bearing (18) is fitted to theright end of the hollow cylinder 2), a left bearing plate (20) isprovided at the left end of the hollow cylinder (2), a lid (22) to be adischarging port give a resistance, a screw conveyer (24) is insertedand borne in the above mentioned hollow cylinder (2) and a shaft (25) ofsaid screw conveyer is connected with the above mentioned motor (14)through such operatively connecting mechanism (26) as a chain.

The operation of the embodiments of the instant invention shown in FIG.3 is as follows. When the motor (14) is rotated and material is fed inthrough the feeding port (17), the rocking hollow-plates (6) will berocked by the rotation of the crank (13), therefore water and fineparticles will be filtered'through the multiplate filtering part (9) andwill be discharged downward,'only solids will be conveyed leftward bythe screw conveyer (24) and will be further squeezed by the force of thesprings (23) and, if the multiplate filtering part (9) is provided asinclined downward .from the horizontal plane,-the water will flow backand will be again discharged out of the multiplate filtering part (9).

The present invention therefore as described aboveprovides rockingmotion of the rocking hollow plate (6) which prevents clogging betweenrocking hollow plate (6) and adjacent fixed hollow plate.(5) and thusfine particles and water can be favorably filtered.

Further, in the present. invention, as the rocking hollowplate (6)between the fixed hollow plates (5) rocks, water and fine particles canbe removed without clogging and, as solids conveyed by the screwconveyer (24) arrive at the lid (22) and push it open against the forceof the springs (23), water can be squeezed and the intensity of thesqueeze can'be easily'c ontrolled by adjusting the springs (23) but thesame object can be attained by any other mechanism giving a resistiveforce. i

Furthermore, in case of providing a multiplatefiltering, part (9) at theleft side of: the hollow cylinder (2),

squeezing and dewatering are attained effectively.

What is claimed is:

1. A multiplate filter for filtering out solids from a 4 mixture ofsolid, and liquid material, said filter being usable in a screw presshaving a hollow tube-carrying a screw conveyor for conveying said.mixture there-- screw conveyor is also allowed to pass freelypreselected space set by said spacer means liquid of said mixture passesbetween said rocking and fixed plates and out of said filter whilesolids of said mixture are conveyed through said hollow tube on 5 saidscrew conveyor.

2. A filter asclaimed in claim 1, wherein said rocking means isoperatively associated with said rocking plates through lug meansmounted on each of said rocking plates, said rocking plates beinginterconnected by rod means joining each lug means of each rocking platetogether.

1. A multiplate filter for filtering out solids from a mixture of solidand liquid material, said filter being usable in a screw press having ahollow tube carrying a screw conveyor for conveying said mixturetherethrough, whereby said hollow tube is sectioned at least at oneportion thereof, with said filter mountable therein, said multiplatefilter comprising: a plurality of interconnected fixed plates, eachhaving a substantially centrally positioned hole to allow said screwconveyor to pass freely therethrough when said filter is mounted in saidscrew press; a plurality of movably mounted interconnected rockingplates, each plate having a centrally positioned hole and mounted insaid filter in alternative positions between each said fixed plate, sothat said screw conveyor is also allowed to pass freely through eachcentrally positioned hole thereof when said filter is mounted in saidscrew press; spacer means mounted between each of said fixed plates topermit free movement of said rocking plates and allow liquid of saidmixture to pass between said fixed plates and said rocking plates andout of said multiplate filter; rocking means operatively associated witheach of said rocking plates to cause said rocking plates to rock inrelation to said fixed plates along the periphery of the hole containingthe screw conveyor and in parallel with the fixed plates whereby at apreselected space set by said spacer means liquid of said mixture passesbetween said rocking and fixed plates and out of said filter whilesolids of said mixture are conveyed through said hollow tube on saidscrew conveyor.
 2. A filter as claimed in claim 1, wherein said rockingmeans is operatively associated with said rocking plates through lugmeans mounted on each of said rocking plates, said rocking plates beinginterconnected by rod means joIning each lug means of each rocking platetogether.